Car door mug holder



FIG. 1 is a perspective view of a car door mug holder, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side, elevational view, the left side being substantially a mirror image thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a car door mug holder, as shown and described. 